
package com.gitee.fdc.kits;

import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.Map;

import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.Resource;

import freemarker.template.Configuration;
import freemarker.template.Template;
import com.gitee.fdc.kits.Exceptions;

/**
 * FreeMarkers工具类
 * 
 * @author ThinkGem
 * @version 2013-01-15
 */
public class FreeMarkers {

    public static String renderString(String templateString, Map<String, ?> model) {
	try {
	    StringWriter result = new StringWriter();
	    Template t = new Template("name", new StringReader(templateString), new Configuration());
	    t.process(model, result);
	    return result.toString();
	} catch (Exception e) {
	    throw Exceptions.unchecked(e);
	}
    }

    public static String renderTemplate(Template template, Object model) {
	try {
	    StringWriter result = new StringWriter();
	    template.process(model, result);
	    return result.toString();
	} catch (Exception e) {
	    throw Exceptions.unchecked(e);
	}
    }

    public static Configuration buildConfiguration(String directory) throws IOException {
	Configuration cfg = new Configuration();
	Resource path = new DefaultResourceLoader().getResource(directory);
	cfg.setDirectoryForTemplateLoading(path.getFile());
	return cfg;
    }

    public static void main(String[] args) throws IOException {
	// // renderString
	// Map<String, String> model =
	// com.google.common.collect.Maps.newHashMap();
	// model.put("userName", "calvin");
	// String result = FreeMarkers.renderString("hello ${userName}", model);
	// System.out.println(result);
	// // renderTemplate
	// Configuration cfg = FreeMarkers.buildConfiguration("classpath:/");
	// Template template = cfg.getTemplate("testTemplate.ftl");
	// String result2 = FreeMarkers.renderTemplate(template, model);
	// System.out.println(result2);

	// Map<String, String> model =
	// com.google.common.collect.Maps.newHashMap();
	// model.put("userName", "calvin");
	// String result =
	// FreeMarkers.renderString("hello ${userName} ${r'${userName}'}",
	// model);
	// System.out.println(result);
    }

}
